CCNA Certification – EIGRP Configuration Lab Simulation

Lab Simulation Question – EIGRP

CCNA.com has a small network that is using EIGRP as its IGP. All routers should be running an EIGRP AS number of 12. Router MGT is also running static routing to the ISP.CCNA.com has recently adding the ENG router. Currently, the ENG router does not have connectivity to the ISP router. All other interconnectivity and Internet access for the existing locations of the company are working properly.

The task is to identify the fault(s) and correct the router configuration(s) to provide full connectivity between the routers.

Access to the router CLI can be gained by clicking on the appropriate host.

From the output above, we know that this router was wrongly configured with an autonomous number (AS) of 22. When the AS numbers among routers are mismatched, no adjacency is formed.
(You should check the AS numbers on other routers for sure)
To solve this problem, we simply re-configure router ENG router with the following commands:

Some Modification in Question

After adding ENG Router, no routing updates are being exchanged between MGT and the new location. All other inter connectivity for the existing locations of the company are working properly.
But Internet connection for existing location including Remote1 and Remote2 networks are not working.

Faults Identified:

1. Incorrect Autonomous System Number configured in ENG Router.
2. MGT Router does not advertise route to the new router ENG.
3. Internet Connection is not working all stations.
We need to correct the above two configuration mistakes to have full connectivitySteps:
1. ENG Router: Change the Autonomous System Number of ENG
2. Perimiter Router: Add the network address of interface of Permiter that link between MGT and
ENG.
3. Perimiter Router: Add default route and default-network.
Check the IP Address of S1/0 interface of MGT Router using show running-config command.

(The interfaced used to connect to the ISP)
!
interface Serial1/0
ip address 198.0.18.6 255.255.255.252
!

For Internet sharing we have create a default route, and add default-network configuration. The IP address is 198.0.18.6/30. Then the next hop IP will be 198.0.18.5.ENG Router

Important:

If you refer the topology and IP chart, the MGT Router uses Fa0/0 to connect ENG Router, S0/0 used to connect Remote1, and S0/1 used to connect Remote2.
Refer to the command show running-config, the command #PASSIVE-INTERFACE will deny EIGRP updates to specified interface. In that case we need to use #no passiveinterface to allow the routing updates to be passed to that interface. For example when used the #show run command and we see the output like below.